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QNX Upgrade Kit
Installation of the XPS-QKIT
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Objective
Replace the original XPS CPU board (90027567) with the QNX CPU board (E4797x).
Necessary Equipment
• 1 QNX CPU board (E4797x)
• 1 ribbon cable (E4770x)
• 4 cable ties
1. Remove the XPS Cover
1. Turn the power off the XPS controller
2. Disconnect all power and stage cables from the XPS.
3. Remove the 3 Phillips screws; one at center-rear, the other two, under the rear-corners. If rack mounting brackets are
installed, remove the brackets first.
4. Remove the cover by sliding it towards the back by approx. 1 inch and then lifting it straight up.
Inside view of an XPS.
Screw
Locations
Bottom
Foot
CPU board
(90027567)
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QNX Upgrade Kit
Installation of the XPS-QKIT
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2. Removing the CPU Board (90027567)
WARNING
Before handling any circuit board, electrically ground yourself properly using a grounding wrist
strap! Otherwise, static electricity can damage the components on the board.
The CPU board is held by 3 screws (3x6) and a retention bracket.
1. Remove the 3 screws and the retention bracket. Put them aside for installation later.
2. Disconnect the 3 cables from the CPU board. (see photos).
i. DiskOnModule supply cable – Disconnect the DiskOnModule supply cable at the MOLEX connector. A cable
tie might need to be cut to allow removal of the DiskOnModule supply cable. If the space is too tight, another
method is to carefully pull out the CPU board about 3" and then carefully unplug the connectors.
ii. COM1 port cable (E4421x).
iii. Supply 4-pin cable.
Retention
Bracket
Blocking
Screw
DiskOnModule
Supply Cable
Molex Connector
COM1
Port Cable
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QNX Upgrade Kit
Installation of the XPS-QKIT
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WARNING
Be careful with handling cables and connectors. If you suspect a cable may be damaged after
handling, replace it with a new cable.
3. Vertically pull the CPU board and remove it from the XPS.
3. Replacement of the COM1 Port Cable (E4421x)
1. Remove the metal cover plate (E3952x) secured above the power supply with 2, 3x6 screws. Set aside for later use.
View of the two power supplies after removing the metal cover plate.
Supply
4-Pin Cable
E3952x
3x6
Screws
2 Cable
Ties
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QNX Upgrade Kit
Installation of the XPS-QKIT
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2. The COM1 port cable (E4421x) is attached with cable ties at 2 locations: one is on the power supply partition, and
the second is near the XPS-RC PCB (E3776x).
3. Cut these 2 cable ties with care.
4. Unplug the COM1 port cable (E4421x) on J1 from the XPS-RC PCB (E3776x).
5. Remove the COM1 port cable from the XPS.
4. Installation of the Ribbon Cable (E4770x)
At the cable ends, there are two different connectors:
i. 1 mm pitch connector (to connect to J1 on the XPS-RC PCB (E3776x)).
ii. 2.54 mm pitch connector (to connect to the COM1 of the new CPU board (E4797A)).
The ribbon cable will be mounted in the same location in the XPS rack as the old COM1 port cable.
1. Connect the 1 mm pitch connector to J1 on the XPS-RC PCB (E3776x).
2. Use 2 cable ties to secure the ribbon cable (E4770x) at the same locations as the old cable ties. Do not tighten until
the cable routing is correct.
COM1
Port Cable
New Ribbon Cable
(E4770x)
J1
Connector
Cable
Tie
J1
Connector
XPS-RC
PCB
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QNX Upgrade Kit
Installation of the XPS-QKIT
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5. Installation of the Replacement QNX CPU Board (E4797x)
1. Position the CPU board above its slot to enable easy cable connections. Do not insert into the slot yet.
2. Connect the DiskOnModule to the Molex connector.
3. Connect the Ribbon cable to the connector CN_COM1 on the CPU board.
4. Connect the Supply 4-pin cable to the connector CN_12V on the CPU board. The CN_12V connector is the upper
part of the white connector.
5. IInstall the DOM onto the QNX CPU.
Ribbon
Cable
CN_COM1
CN_12V
(shown
connected)
Molex connector,
DiskOnModule
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QNX Upgrade Kit
Installation of the XPS-QKIT
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6. Insert the QNX CPU board in the ISA and PCI slot. You may need some effort to fully seat the board.
CAUTION
Be careful not to pinch any cables while inserting the QNX CPU board in the ISA and PCI slot.
Ensure that cables do not touch the CPU board and tie-wrap as needed.
CPU board after installation.
7. Reinstall the retention bracket and press down to secure the new QNX CPU board (E4797x) with the 3 screws.
8. Reinstall the metal cover plate (E3952x) with the 2 screws.
E3952
Retention
Bracket
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QNX Upgrade Kit
Installation of the XPS-QKIT
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6. Replace the XPS Cover
Follow the steps in the reverse order from Section 1 to replace and secure the cover.
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